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A promising Ag2CrO4/LaFeO3 heterojunction photocatalyst applied to photo-Fenton degradation of RhB
Ye, Yongchun1,2; Yang, Hua1,2; Zhang, Haimin2; Jiang, Jinling2
2020-05-24
Source PublicationENVIRONMENTAL TECHNOLOGY
ISSN0959-3330
Volume41Issue:12Pages:1486-1503
AbstractAg2CrO4 nanoparticles (10-35 nm) were assembled onto LaFeO3 nanoparticles (20-60 nm) via a facile chemical precipitation method to form novel Ag2CrO4-LaFeO3 heterojunction composite photocatalysts. The prepared Ag2CrO4-LaFeO3 composites were characterized by XRD, SEM, TEM, XPS, BET, UV-vis DRS, PL spectroscopy and EIS and photocurrent response. The TEM result clearly shows that Ag2CrO4 particles are decorated onto LaFeO3 particles to form Ag2CrO4-LaFeO3 heterojunction. Compared to bare LaFeO3, the 10%Ag2CrO4-LaFeO3 composite exhibits a slightly increased BET specific surface area, increased photocurrent density, decreased charge-transfer resistance and decreased PL emission peaks. Using simulated sunlight as the light source and in the presence of H2O2, the photo-Fenton performance of the composite photocatalysts toward the degradation of RhB was investigated, revealing that they manifest significantly enhanced photo-Fenton degradation of RhB when compared with bare LaFeO3 and Ag2CrO4. Among the composite photocatalysts, 10%Ag2CrO4-LaFeO3 exhibits the highest photo-Fenton activity, which is about 3.1 and 2.5 times higher than that of bare LaFeO3 and Ag2CrO4, respectively. This is attributed to the fact that the composite photocatalysts have highly efficient separation of photogenerated electron-hole pairs due to the formation of Ag2CrO4-LaFeO3 heterojunctions. Active species trapping experiments and center dot OH detection experiments were carried out, from which it is concluded that center dot OH radicals are the dominant reactive species causing the dye degradation. A synergistic mechanism was proposed to elucidate the enhanced photo-Fenton activity of Ag2CrO4-LaFeO3 heterojunction composites.
KeywordAg2CrO4-LaFeO3 heterojunction photo-Fenton performance dye degradation synergistic effect
DOI10.1080/09593330.2018.1538261
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51662027]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000527163200002
PublisherTAYLOR & FRANCIS LTD
Citation statistics
Cited Times:46[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64204
Collection理学院
省部共建有色金属先进加工与再利用国家重点实验室
Corresponding AuthorYang, Hua
Affiliation1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
2.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China
First Author AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials;  Coll Sci
Corresponding Author AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials;  Coll Sci
First Signature AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
Recommended Citation
GB/T 7714
Ye, Yongchun,Yang, Hua,Zhang, Haimin,et al. A promising Ag2CrO4/LaFeO3 heterojunction photocatalyst applied to photo-Fenton degradation of RhB[J]. ENVIRONMENTAL TECHNOLOGY,2020,41(12):1486-1503.
APA Ye, Yongchun,Yang, Hua,Zhang, Haimin,&Jiang, Jinling.(2020).A promising Ag2CrO4/LaFeO3 heterojunction photocatalyst applied to photo-Fenton degradation of RhB.ENVIRONMENTAL TECHNOLOGY,41(12),1486-1503.
MLA Ye, Yongchun,et al."A promising Ag2CrO4/LaFeO3 heterojunction photocatalyst applied to photo-Fenton degradation of RhB".ENVIRONMENTAL TECHNOLOGY 41.12(2020):1486-1503.
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